difference between High-Z and Low-Z with digital signals

[prabhu_psg]

Hi
In digital signal what is the difference between High-Z and LOw-Z(Mostly given in memory data sheets)

Thanks

Prabhu.G

 

[ray123]

In the memory data sheet:
The Low-Z timings measure a transition from the High-Z (tri-state) level toward
either VOH or VOL.
The High-Z timings measure a transition from either VOH or VOL toward tri-state level.